In the address book (and only in the address book), none of the control-key keyboard shortcuts listed in the pull-down menus work for me.  Most of the shortcuts do nothing at all, but some of them have an entirely different effect. For example:

* Instead of editing the selected address, Ctrl+Return does nothing.

* Instead of closing the window, Ctrl+W does nothing.

* Instead of creating a new address, Ctrl+N selects the next address.